That was on the second day of battle, when he carried a badly wounded soldier back to the underground shelter, the dying soldier shoved a blue crystal into his hand. Before he could say another word, he died.,Xu Tian's eyes were bloodshot, he suddenly lowered himself, picked up a stone with both hands, and roared as he charged forward. He frantically smashed the stone against the head of the enemy who had already fallen to the ground!,The piece of blue crystal that had been lodged in his。